Gang-saw mill



2 Sheets-Sheet 1 RNEY lNvENToR G. A. DICKIE GANG SAW MILL med Jan. 24.1921 Jan. 22 1924.

Jan. 22 1924.

` G. A. DlcKlE j vlGmcsf'smw MILL l Filed aan. 24., 1921,v

; l2 Sheets-Sheet 42 Patented Jan.. Z2, '1924.

' matite GEORGE A. DICKIE, OF SEATTLE, WASHINGTON.

GANG-SAW MILL.

Application led January 24, 1921. Serial No. 439,464.

To all whom t may concern.'

Be it known that I, GEORGE A. DICKIE, a citizen of the United States ofAmerica., and resident of the city of Seattle, in the county of King andState of Washington, have invented certain new and useful Improvementsin Gang-Saw Mills, of which the following is a specification.

My invention relates to certain improvements in gang saws of a typewhich is intended for sawing small logs and has for its object theprovision of means for better supporting and holding in proper positionthe sawed end of the log until the entire length of the log has beensawed.

The features of my invention which I believe te be new and upon which Idesire to obtain a patent will be hereinafter described and thenparticularly pointed out in the claims.

In the accompanying drawings I have shown my invention embodied in theform of construction which I now prefer to use.

Figure 1 is a side elevation of a mill having my improvement appliedthereto.

Figure 2 is a transverse section through the same mill showing how thesawed end of the log is supported while being carried away from thesaws.

Figure 3 is a top or plan view of one of the bolsters carrying the boardsupportinr plates which engage and support the sawe end of the log.

It is the object of my invention to provide means for better supportingthe sawed end of a log in gang mills, particularly in those which cutsmall round logs.

The log handling and feeding mechanism employs an endless chain, as 7,which is passed over suitable sprocket wheels, as 70, driven in anyconvenient manner. Secured to the chain 7 at suitable intervals areshafts 74: which carry wheels 75 and 76 which travel upon guide rails,as 8 and 80. One of these wheels, as 75, is preferably made grooved andthe rail 8 upon which it runs is similarly beveled so as to insuremovement of the same in a true straight line. Each shaft 74 is providedwith a bunk or bolster' 77 upon which the log 78 rests.

Similar mechanisms are used for feeding the log to the saws and forcarrying away the boards into which the saws cut the log, except forsuch variations as are specifically described. n

Upon each of the holsters of the carrying away mechanisms I provide apair of plates which extend upwardly and are adapted to ent-er the kerfsmade by the saw which lies at each side of the center of the log. Thisis clearly shown in Figure 2. These plates may have an upwardlyprojecting llange 9 and a base flange 90. The base flange is providedwith a pair of slots, as 91, (see Figure 3), through which pass securingbolts 92, by means of which it is securely held upon the bolster and bymeans of which also, the separation of the two plates 9 may be varied tocorrespond with the different thickness of the central cut which issawed from the log. These are positioned so that they automaticallyenter the saw kerfs and serve to maintain the sawed portion of the login vertical position and to prevent it from rolling over and,particularly after the member by which the rear end of the log issecured to the bolster of the other chain has been removed. Both of thechains 7 and 7 are provided with rails, as 11 and 12, so positioned asto engage the lower or return part of t-he chain and support it.

The above mechanisms will hold the partially sawed log against turninguntil it has been completely sawed. The supporting plates 9 beingadjustable transversely of the log may be positioned to conform to anythickness of timber into which the center of the log may be sawed. WhileI have described these plates as entering the kerfs at each side of thecentral plank, it is evident that they may be separated more than thisif at any time this may seem desirable.

What I claim as my invention is:

1. In a gang saw mill, a device for supporting the sawed end of the .logand conveying away the sawed lumber, comprising a trackway, and endlesschain extending lengthwise of the trackway, a series of trucks securedto said chain at intervals and each comprising an axle, wheels upon theaxle and engaging the trackway and a bolster, and a pair of platessecured to the bloster and adapted to enter saw kerfs in the log. w

2. In a gang saw mill, means for conveying away the sawed end of the logcomprisin an endless chain carrying log-supporting bolsters, bladescarried by the lbolsters and adapted to enter the` saw kerfsy and meansfor adjusting said blades transversely of the chain to accommodatediierent positions of the central saws.

3. A device as in elaiin 2 having blades provided with a base flangeslot-ted transversely of the chain and securing bolts Within the slotsof the base.

Signed at Seattle, King County, lVashington, this 15th day of January,1921.

GEORGE A. DICKIE.

